Splitting checked luggage across two medium cases rather than one or two very large cases tends to work better for a family of four — it’s easier for two people to each wheel a manageable case than for one person to struggle with an oversized one, and it hedges against losing everything if one bag goes missing.
For cabin allowances, a mix of a cabin case for an adult and lighter travel backpacks for children or a second adult usually covers the practical range of what needs to be carried through security and boarding without anyone struggling with an oversized bag through a crowded terminal.
Packing cubes become more valuable at this scale than for solo travel — color- or size-coding them by family member inside shared checked cases makes finding a specific person’s items far faster than searching through an undivided family case.
Last reviewed 26 August 2026